CN101823122A - Negative-pressure molding process of casting refractory material product - Google Patents
Negative-pressure molding process of casting refractory material product Download PDFInfo
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- CN101823122A CN101823122A CN 201010131224 CN201010131224A CN101823122A CN 101823122 A CN101823122 A CN 101823122A CN 201010131224 CN201010131224 CN 201010131224 CN 201010131224 A CN201010131224 A CN 201010131224A CN 101823122 A CN101823122 A CN 101823122A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/03—Sand moulds or like moulds for shaped castings formed by vacuum-sealed moulding
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Abstract
The invention discloses a negative-pressure molding process of a casting refractory material product, comprising the following steps: 1. placing a model on a template with an exhaust chamber, wherein, the model is equipped with air vents; coating a thin film on a model surface layer, and sticking the thin film on the model surface layer by vacuum suction; and spraying zircon powder paint on the model outer surface coated with the thin film; 2. placing a sand box on the template surrounding the model, wherein, the side wall of the sand box is equipped with a filtering air tube; filling dry sand into the sand box, slightly shocking, coating a back film to close the sand box, and sucking the sand box in a negative pressure condition so as to harden a casting mould; 3. removing the vacuum status of an exhaust chamber in step 1, lifting the box and drawing to finish casting box; 4. reserving a casting head and an exhaust vent on an upper box consistent with the casting box of the casting mould, filling up dry sand, sealing the thin film and then sucking an inner cavity in a negative pressure condition; and 5. closing the upper box and the casting box to form an overall casting mould with the casting head and the cavity; removing the upper box and the casting box at the front of a furnace for direct pouring under a negative pressure status; and after maintaining pressure and solidification, keeping the temperature of a workpiece for 7-12 days to obtain the casting refractory material product.
Description
Technical field
The present invention relates to the formative method of casting refractory material product and metal oxide foundry goods, especially relate to a kind of negative-pressure molding process of casting refractory material product.
Background technology
In the fused alumina zirconia goods formative technology that glass and glassware kiln are used, adopt water-glass sand always.But since water-glass sand regeneration difficulty, the cost height, recycling rate of waterused is low, and disposable use can produce a large amount of industrial refuses, does not have method for distinguishing to substitute all the time.Need add when producing simultaneously that waterglass mixes system, plays type in puddle mixer, oven dry, glue type etc., complex procedures, labour intensity is big, and power consumption is big; Casting mold needs six with cope match plate combination bonding, and dimensional accuracy can not get guaranteeing.The negative-pressure sealing formative technology is a kind of without binding agent, water and other additive, only seal, take out the technology that negative pressure is carried out moulding with dry sand, plastic sheeting, the product surface of producing is bright and clean, size is accurate, quality is good, and is at the early-stage in the cast iron industry, only is used for the fork truck counterweight and produces.Because the otherness between Cast Iron Products and the casting refractory material product, as different on material (metals and nonmetal poor), (cast iron is single crystals to the crystal form difference, melt-cast products is many crystallizations), (cast iron 1340--1380 ℃ of casting temperature difference, melt-cast products 1800--2100 ℃) or the like, be a new problem that remains to be broken through so negative-pressure molding process is applied to the castable refractory industry.
Summary of the invention
The object of the present invention is to provide that a kind of sand fallout is good, end product quality is up to standard and the negative-pressure molding process of the casting refractory material product of energy-saving and emission-reduction.
For achieving the above object, the present invention can take following technical proposals:
The negative-pressure molding process of casting refractory material product of the present invention, it comprises the steps:
The first step: model is placed on the template that has exhaust chamber, longitudinally is opened in passage and the described exhaust chamber intracavity inter-connection that is connected with vavuum pump on the model; Softening film is covered the model top layer, start vavuum pump, pull of vacuum is close on the model top layer film; Zircon flour coating evenly is sprayed on the model outer surface behind the overlay film;
Second step: place the sandbox that is complementary with moulded dimension around model on above-mentioned template, the sidewall of described sandbox offers the filtration exhaust tube that is connected with vavuum pump; The dry sand of handling well is filled in the described sandbox, covers notacoria sealing sandbox after the microseism, start vavuum pump and be negative pressure, make the casting mold sclerosis taking out in the sandbox;
The 3rd step: remove the vacuum state in the exhaust chamber in the first step, promptly eliminate the absorption affinity to model top layer film, the casting mold nowel is finished in top case molding then;
The 4th step: will reserve dead head and steam vent with casting mold nowel top box of the same size, and fill dry sand and wipe the layer of sand surface off, and by the filtration exhaust tube of offering on the sidewall its inner chamber will be evacuated to negative pressure after the diaphragm seal;
The 5th step: with above-mentioned top box and nowel altogether, be formed with the block mold of dead head and die cavity, be in negative pressure state at upper and lower case and be displaced downwardly to the stokehold and directly pour into a mould, after the 10-120min pressurize is solidified, remove upper and lower box cavity negative pressure state; After workpiece is incubated 7-12 days, can obtain casting refractory material product.
Described film carries out thermoplastic by heater to it, and softening temperature is 80--120 ℃.
Be 0.04～0.095Mpa to the required pull of vacuum of the top layer film of model in the described first step.
The thickness of described zircon flour coating is 0.3-1.5mm, can guarantee not scab of goods, pore-free.
The granularity of choosing dry sand is the 50-100 order; The content of silica makes it meet the requirement of casting refractory material product greater than 99% in the dry sand.
The invention has the advantages that and adopt above-mentioned negative-pressure molding process, the product surface of producing is bright and clean, not scab, the white light yellow complexion of color and luster, inner pore-free; Because the vacuum room's sandbox that adopts is a movable structure, cast back product can be placed in the tight flask and be incubated, and this air chamber can be reused, and greatly reduces production cost.Fill the dry sand of binder free in the sandbox, saved binding agent, additives or the baking operation of molding sand in other formative technologies, reduced environmental pollution, belong to green casting technique, reduced the discharge capacity of industrial refuse, the old sand reclamation rate reaches more than 98%, and effects of energy saving and emission reduction is remarkable; Adopt direct casting during cast, reduced thermal loss, the easy moulding of goods; Under negative pressure state, water method, can control the different parts heat dissipation capacity, reach equilibrium and solidify, the goods crackle is significantly reduced.
Description of drawings
Fig. 1 is the structural representation of nowel of the present invention.
Fig. 2 is the structural representation of block mold of the present invention.
The specific embodiment
As shown in Figure 1, 2, the negative-pressure molding process of casting refractory material product of the present invention, it comprises the steps:
The first step: model 1 is placed on the template that has exhaust chamber 2, longitudinally is opened in passage 3 and described exhaust chamber 2 intracavity inter-connections that are connected with vavuum pump on the model 1; Extensibility is big, cover model 1 top layer after the plastic sheeting 4 usefulness heater thermoplastics that the plastic deformation rate is high (temperature of plastic sheeting heating is 80--120 ℃), start vavuum pump, the pull of vacuum of 0.04～0.095Mpa is close on model 1 top layer film 4; Alcohol zircon flour coating evenly is sprayed on the model outer surface behind the overlay film, and coating layer thickness is for selecting 0.3-1.5mm, if the too thin goods of coating can scab, the too thick gas permeability of coating is poor, can cause the goods internal porosity;
Second step: place the vacuum room's sandbox 5 that is complementary with model 1 size around model 1 on above-mentioned template, the sidewall of described sandbox 5 offers the filtration exhaust tube 6 that is connected with vavuum pump; Granularity 50-100 order, the dioxide-containing silica handled well are filled in the described sandbox 5 greater than 99% dry sand 7, through microseism in 30～60 seconds, make sand reach consolidation to higher density, cover notacoria 8 sealing sandboxes 5, start vavuum pump and be negative pressure, make the casting mold sclerosis taking out in the sandbox 5;
The 3rd step: remove the vacuum state in the exhaust chamber 2 in the first step, promptly eliminate the absorption affinity to model 1 top layer film 4, the casting mold nowel is finished in top case molding then;
The 4th step: will reserve dead head 10 and steam vent 11 with casting mold nowel top box 9 of the same size, and fill dry sand 7 and wipe the layer of sand surface off, and by the filtration exhaust tube of offering on the sidewall 12 its inner chamber will be evacuated to negative pressure after the diaphragm seal;
The 5th step: altogether with above-mentioned top box and nowel, be formed with the block mold of dead head 10 and die cavity, be in negative pressure state at upper and lower case and be displaced downwardly to the stokehold and directly pour into a mould, pouring temperature is 1800--2100 ℃, after the 10-120min pressurize is solidified, remove upper and lower box cavity negative pressure state; In former sandbox, (also vacuum room's sandbox can be extracted, reuse, only in tight flask) out insulation after 7-12 days, can obtain any surface finish, the satisfactory casting refractory material product of color and luster; Because the refractoriness of used sand meets the cast requirement of casting refractory material product, and spray certain thickness zircon flour coating and both can guarantee not scab of product surface, pore-free can make sand not be sintered again, and the sand of outflow can repeat to use after cooling again.
Claims (5)
1. the negative-pressure molding process of a casting refractory material product, it is characterized in that: it comprises the steps:
The first step: model (1) is placed on the template that has exhaust chamber (2), longitudinally is opened in passage (3) and described exhaust chamber (2) intracavity inter-connection that is connected with vavuum pump on the model (1); Softening film (4) is covered model (1) top layer, start vavuum pump, pull of vacuum is close on model (1) top layer film (4); Zircon flour coating evenly is sprayed on the model outer surface behind the overlay film;
Second step: place the sandbox (5) that is complementary with model (1) size around model (1) on above-mentioned template, the sidewall of described sandbox (5) offers the filtration exhaust tube (6) that is connected with vavuum pump; The dry sand of handling well (7) is filled in the described sandbox (5), covers notacoria (8) sealing sandbox (5) after the microseism, start vavuum pump and be negative pressure, make the casting mold sclerosis taking out in the sandbox (5);
The 3rd step: remove the vacuum state in the exhaust chamber (2) in the first step, promptly eliminate the absorption affinity to model (1) top layer film (4), the casting mold nowel is finished in top case molding then;
The 4th step: will reserve dead head (10) and steam vent (11) with casting mold nowel top box of the same size (9), and fill dry sand (7) and wipe the layer of sand surface off, and by the filtration exhaust tube of offering on the sidewall (12) its inner chamber will be evacuated to negative pressure after the diaphragm seal;
The 5th step: with above-mentioned top box and nowel altogether, be formed with the block mold of dead head (10) and die cavity, be in negative pressure state at upper and lower case and be displaced downwardly to the stokehold and directly pour into a mould, after the 10-120min pressurize is solidified, remove upper and lower box cavity negative pressure state; After workpiece is incubated 7-12 days, can obtain casting refractory material product.
2. the vacuum casting process of casting refractory material product according to claim 1, it is characterized in that: described film (4) carries out thermoplastic by heater to it, and softening temperature is 80--120 ℃.
3. the negative-pressure molding process of casting refractory material product according to claim 1 is characterized in that: be 0.04～0.095Mpa to the required pull of vacuum of the top layer film (4) of model (1) in the described first step.
4. the negative-pressure molding process of casting refractory material product according to claim 1, it is characterized in that: the thickness of described zircon flour coating is 0.3-1.5mm.
5. the negative-pressure molding process of casting refractory material product according to claim 1, it is characterized in that: the granularity of choosing dry sand is the 50-100 order; The content of silica is greater than 99% in the dry sand.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010131224 CN101823122A (en) | 2010-03-24 | 2010-03-24 | Negative-pressure molding process of casting refractory material product |
| PCT/CN2010/000941 WO2011116508A1 (en) | 2010-03-24 | 2010-06-24 | Negative pressure molding method for casting refractory material product |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010131224 CN101823122A (en) | 2010-03-24 | 2010-03-24 | Negative-pressure molding process of casting refractory material product |
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| CN101823122A true CN101823122A (en) | 2010-09-08 |
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| CN 201010131224 Pending CN101823122A (en) | 2010-03-24 | 2010-03-24 | Negative-pressure molding process of casting refractory material product |
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| WO (1) | WO2011116508A1 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672794A (en) * | 2012-06-06 | 2012-09-19 | 瑞泰科技股份有限公司 | Composite sand mould forming process for producing casting fireproof materials |
| CN102699275A (en) * | 2012-05-22 | 2012-10-03 | 华中科技大学 | Flaskless V-method casting process |
| CN103071763A (en) * | 2013-01-31 | 2013-05-01 | 宁夏众信机械设备制造有限公司 | Dry-sand negative pressure casting method of calcium carbide smelting caldron and calcium carbide smelting caldron |
| CN103100698A (en) * | 2013-03-04 | 2013-05-15 | 济南圣泉倍进陶瓷过滤器有限公司 | Riser sleeve and casting device |
| CN103143680A (en) * | 2013-03-04 | 2013-06-12 | 济南圣泉倍进陶瓷过滤器有限公司 | Riser bush and casting device |
| WO2013181876A1 (en) * | 2012-06-06 | 2013-12-12 | 都江堰瑞泰科技有限公司 | Combined mold for manufacturing fusion-cast refractory |
| CN105195672A (en) * | 2015-09-15 | 2015-12-30 | 蚌埠冠宜型材科技有限公司 | Manufacturing technology for one-time forming gate door through integral casting under vacuum environment |
| CN106001439A (en) * | 2016-06-06 | 2016-10-12 | 湖北万鑫精密铸锻股份有限公司 | Integral casting digging bucket and manufacturing method thereof |
| CN109622887A (en) * | 2019-02-20 | 2019-04-16 | 都江堰瑞泰科技有限公司 | Film covering device and its coating technique based on vacuum forming |
| CN111774530A (en) * | 2020-07-11 | 2020-10-16 | 青岛盛美机械有限公司 | V-method molding process capable of casting propeller |
| CN112008829A (en) * | 2020-09-21 | 2020-12-01 | 成都展新电熔耐火材料有限公司 | Production process of integral refractory brick and refractory brick prepared by production process |
| CN115351875A (en) * | 2022-07-28 | 2022-11-18 | 郑州远东耐火材料有限公司 | Combined type fused brick heat-preservation sand box convenient for demoulding and demoulding method |
| WO2023221341A1 (en) * | 2022-05-17 | 2023-11-23 | 南京航空航天大学 | Method for preparing negative-pressure film-coated frozen sand mold |
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| CN108500219A (en) * | 2018-05-21 | 2018-09-07 | 沈阳永赢达铸业有限公司 | A kind of molding sand sandbox and reduce molding sand casting method |
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- 2010-06-24 WO PCT/CN2010/000941 patent/WO2011116508A1/en active Application Filing
Patent Citations (5)
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| US4043376A (en) * | 1976-06-16 | 1977-08-23 | Nippon Gakki Seizo Kabushiki Kaisha | Casting process by vacuum molding |
| JPH06122038A (en) * | 1992-10-15 | 1994-05-06 | Agency Of Ind Science & Technol | Vacuum molding process |
| CN1187397A (en) * | 1997-01-10 | 1998-07-15 | 北京科技大学 | Roller vacuum sealing moulding technique |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699275A (en) * | 2012-05-22 | 2012-10-03 | 华中科技大学 | Flaskless V-method casting process |
| WO2013181876A1 (en) * | 2012-06-06 | 2013-12-12 | 都江堰瑞泰科技有限公司 | Combined mold for manufacturing fusion-cast refractory |
| WO2013181875A1 (en) * | 2012-06-06 | 2013-12-12 | 都江堰瑞泰科技有限公司 | Composite sand casting process for producing cast fire-resistant material |
| CN102672794B (en) * | 2012-06-06 | 2014-05-28 | 瑞泰科技股份有限公司 | Composite sand mould forming process for producing casting fireproof materials |
| CN102672794A (en) * | 2012-06-06 | 2012-09-19 | 瑞泰科技股份有限公司 | Composite sand mould forming process for producing casting fireproof materials |
| CN103071763B (en) * | 2013-01-31 | 2016-03-16 | 宁夏众信机械设备制造有限公司 | Calcium carbide smelts pot dried sand negative-pressure casting method and calcium carbide smelts pot |
| CN103071763A (en) * | 2013-01-31 | 2013-05-01 | 宁夏众信机械设备制造有限公司 | Dry-sand negative pressure casting method of calcium carbide smelting caldron and calcium carbide smelting caldron |
| CN103100698A (en) * | 2013-03-04 | 2013-05-15 | 济南圣泉倍进陶瓷过滤器有限公司 | Riser sleeve and casting device |
| CN103143680A (en) * | 2013-03-04 | 2013-06-12 | 济南圣泉倍进陶瓷过滤器有限公司 | Riser bush and casting device |
| CN103100698B (en) * | 2013-03-04 | 2016-02-10 | 济南圣泉倍进陶瓷过滤器有限公司 | Riser buss and casting device |
| CN105195672A (en) * | 2015-09-15 | 2015-12-30 | 蚌埠冠宜型材科技有限公司 | Manufacturing technology for one-time forming gate door through integral casting under vacuum environment |
| CN106001439A (en) * | 2016-06-06 | 2016-10-12 | 湖北万鑫精密铸锻股份有限公司 | Integral casting digging bucket and manufacturing method thereof |
| CN106001439B (en) * | 2016-06-06 | 2019-01-15 | 湖北万鑫精密铸锻股份有限公司 | A kind of monoblock cast bucket |
| CN109622887A (en) * | 2019-02-20 | 2019-04-16 | 都江堰瑞泰科技有限公司 | Film covering device and its coating technique based on vacuum forming |
| CN111774530A (en) * | 2020-07-11 | 2020-10-16 | 青岛盛美机械有限公司 | V-method molding process capable of casting propeller |
| CN112008829A (en) * | 2020-09-21 | 2020-12-01 | 成都展新电熔耐火材料有限公司 | Production process of integral refractory brick and refractory brick prepared by production process |
| WO2023221341A1 (en) * | 2022-05-17 | 2023-11-23 | 南京航空航天大学 | Method for preparing negative-pressure film-coated frozen sand mold |
| CN115351875A (en) * | 2022-07-28 | 2022-11-18 | 郑州远东耐火材料有限公司 | Combined type fused brick heat-preservation sand box convenient for demoulding and demoulding method |
| CN115351875B (en) * | 2022-07-28 | 2023-08-18 | 郑州远东耐火材料有限公司 | Combined type electric melting brick heat insulation sand box convenient for demolding and demolding method |
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| WO2011116508A1 (en) | 2011-09-29 |
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